-ing ffff ffii ffrr ffss fftf ffun fgts fiff fifi fift figg figs fiii fing fini finn fins fint firn firs fisi fiss fist fisu fiti fits fitt fnrs fnuf frig frin fris frit frns frst frug frun fsfi fsgs fssf ftii ftrs ftsr fuff fufu fugi fugs fugu fuig fuir fuit funf fung funs funt fur- furg furi furn furr furs furt fusi fuss fust fusu futi futs futu ggfg gggg ggrn ggss giff gifs gift gifu gigg gigi gign gigs giis ging gini ginn gins ginu girg giri girn girr girs girt giru giss gist gits giur gius gnin gnit gnrr gnti gnus grif grig grin gris grit grni grrr grrs grss gruf grug grui grun grur grus grut gsif gsis gstr gsur guff gugg gugi gugu guin guis gung gunn guns gunt gurg guri gurn gurr gurs gurt guru guss gust guti guts gutt gutu guus ifis ifit ifni ifnr ifns ifrf ifri iftn iggs igis igni igns ignu igri igus iiii iiis iiit iirs iisi iisr iist iisu iitr iitt infi infs ings inig inis init inni innr inns innu inri inrs inss inst insu intg inti intn intr ints intu inui inun inus irfu irgs iri- irig irin iris irri irrs irsf irsg irtf irti irts irun irus isin isis isit isnt isrg isri issf issi issr isss issu isti istr ists isus itgs itif itin itis itrf itri itrs itsf itsi itsu ittf itur iugs iuiu iuss iust n-ii nfff nfrs nfsr nfsu ngfs ngns ngri ngsn ngtn ngts ngur nguu niff nift nigg nigs nigt niir niit niiu ning nini nins nirs nirt niru nisi niss nist nisu nitf niti nitr nits niur nngn nnit nnnn nnss nntn nrts nsfs nsin nsis nsnr nssf nssr nsss nsts nstu ntfs ntis ntnu ntru ntsf ntss ntsu nttr ntui nuff nugs nuin nuit nung nunn nuns nunt nuri nurn nurr nurs nurt nuru nusi nuss nust nusu nuts nutt nutu rfgs rgit rgtr rgts riff rifs rift rifu rigg rigi rigs rigu riif riin riis rinf ring rinn riri rirs risi riss rist risu riti rits ritt ritu rius rngs rnin rnnt rnut rrif rrrr rrun rsis rsnn rsnr rsts rstu rtgs rtns rtss rtts ruff ruft rugg rugi rugs ruif ruin ruis ruit runf rung runi runn runs runt ruri rurs ruru rusi russ rust rusu ruti ruts rutt rutu ruun s-ii sfnt sfss sfsu sfts sggg sggs sgss sgts siff sifr sift sifu sigg sigi sign sigs siit sing sini sinn sins sint sinu sirf siri sirr sirs sirt siru sisi siss sist sisu sit- siti sitn sits sitt situ siui sius siut snfu snig snir snit snns snrs sntr snug snur snus srfi sris srni srnn srtr ssgs ssgt ssin ssis ssit ssns ssrg ssri ssrs sssf sssi ssss ssts stfn stfu stgr stif stig stir stis stit stng stnn stnr stns stri strn strs stru stsf stsi stss sttr stuf stug stun stur stus stut suf- suff sufi sufr sufs sufu sug- sugg sugi suig suin suir suis suit sun- sung suni sunn suns sunt sunu sur- surf surg suri surn surr surs surt suru sus- susi suss sust susu suti sutu suus tfin tfrs tfsi tfss tgif tgts tiff tift tigi tigr tigs tiit tiiu ting tini tinn tins tint tinu tiri tirr tirs tiru tisi tiss tist titi tits titt titu tngs tnts tnut trfr tri- trif trig trin tris trit trng trsi trst trtr trug trun trus trut truu tsgt tsig tsin tsis tssf tssg tssi tssr tsst tsts tsui tsun ttff ttfn ttss tttt tuff tufi tuft tufu tugg tugs tugu tuig tuin tuis tuit tuiu tung tuni tunn tuns tunu turf turg turi turn turr turs turt turu tusi tuss tust tuti tuts tutt tutu uggs uggt ugis ugni ugri ugur uguu uint uirr uist uits ungu uni- unif unii unin unir unis unit unni unns unrf unrs uns- unsg unst unts unus unut urff urfi urft urgi urgu urif urin uris uriu urni urns urri ursi urss ursu urts urun urur urus urut usfi usfs usif usin usis usnr usnu ussf ussr usss usst ussu usti usts usui usun usus utin utis utri utti uttu utug uuni uuri uusi uutf uuuu